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Home › Usage › Overview › By Fiscal Year

Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
151,747 150,838 29% 37% 23% 11% 29,970 93% 4% 2% 1%
- Simulation Users 5
8,886 2,734 51% 23% 16% 10% 2,734 92% 4% 1% 3%
- Interactive Users 6
43,988 42,536 35% 32% 19% 14% 7,702 96% 3% 1% 0%
- Download Users 7
132,346 131,446 28% 38% 23% 11% 18,317 95% 3% 2% 0%
Total Users (old defn) 8
52,882 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 8,886 users
Simulation Runs 390,612 jobs
Total CPU Time 3,252 days  
Total Wall Time 27,331 days  
Total Interaction Time 5,520 days  
Users with > 10 mins of CPU Time 1,487 users  
Avg. Number of Simulation Runs/User 44 jobs  
Avg. Time between First and Last Simulation 320,440 days  
Repeat Users with > 10 Simulation Jobs 4,775 users  
Repeat Users with > 3 Months 9 1,597 users  
Table 3: Miscellaneous Statistics
Domains Served 12,128
Cummulative Interactive User Sessions 10 140,194
Cummulative Session Time 8,033 days
Visitors 11 313,281
Visits 12 897,225
New Accounts 7,964
Max User Logins 763 users on 2012-01-30
Web Server Hits 57,166,968
Table 4: Collaboration Usage
Online Meetings 0 meeting sessions
0 participants
Shared Tool Sessions 13 86
New tools under development 43
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
151,747 150,838 29% 37% 23% 11% 29,970 93% 4% 2% 1%
- Registered Users 2
11,944 11,941 47% 26% 17% 10% 11,940 89% 6% 1% 4%
- Unregistered Interactive Users 3
24,503 24,054 28% 35% 22% 15% 2,909 95% 3% 1% 0%
- Unregistered Download Users 4
115,300 114,843 27% 39% 24% 11% 15,121 95% 3% 2% 0%
  1. Sum of Registered Users2, Unregistered Interactive Users3 and Unregistered Download Users4
  2. Number of Users that logged in. User registration assigns a unique login to each individual user.
  3. Number of Unregistered Users, identified by unique hosts/IPs, that had an active Session 10 without logging in. Does not include known web bots/crawlers.
  4. Number of Unregistered users, identified by unique hosts/IPs, that had an active session of less than 15 minutes without logging in and downloaded a non-interactive resource such as PDF or podcast. Does not include web bots/crawlers.
  5. Number of Registered Users2 that ran one or more simulation runs.
  6. All Unregistered Users, identified by unique hosts/IPs, that had an active Session 10. Does not include known web bots/crawlers.
  7. All Unregistered users, identified by unique hosts/IPs that downloaded a non-interactive resource such as PDF or podcast. Does not include known web bots/crawlers.
  8. Sum of Simulation Users 5 + Unregistered Interactive Users 3 including web bots/crawlers.
  9. Number of Simulation users that returned after a gap of 3 months.
  10. Begins when an IP is active on the site for at least 15 minutes. Ends when inactive for more than 30 minutes, including time spent viewing videos.
  11. Identified by a unique IP address / hostname.
  12. Based on MIT OCW metric of Visits: A visit is activity by a unique visitor delimitated by a 30 minute absence from the site on either side of the activity.
    These visits correspond to unique visitors 11. Does not include known web bots/crawlers
  13. Number of Simulation sessions that were shared between 2 or more users.

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